I would appreciate very much, if I could declare a keyword as a parents Keyword, with all its XMP information etc.
But then all keywords (childern) beneath would take automaticaly the declaration from the parents keyword.

"Actions" (Here all information are declared etc.)
-->Football (Takes the declaration from above, from parents keyword)
-->Skiing (Takes the declaration from above, from parents keyword)
etc

I think that is a fantastic idea and I have registered a similar request quite a while ago, i.e., the idea to be able to create templates to configure a whole branch of child keywords with certain default settings inherited from the parent. Sadly, I don't think that request ever received much attention.